—I wonder _______ like to be an astronaut (宇航员).

—I don't know, but I imagine it's exciting. [ ]

A. what is it

B. what it is

C. whether is it

D. whether it is

焦虑障碍的心理症状有：担忧、紧张、着急、烦躁、害怕、不祥预感等焦虑情感为主，伴有注意力不能集中、警觉性增高、记忆障碍等。